“…Several preparations intermediate in time-action between ordinary unmodified insulin and standard protamine zinc insulin have been proposed. Of these the most promising and extensively studied are modifications of standard protamine zinc insulin (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) and globin insulin with zinc (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32).…”